Country guide

Ecuador

Ecuador mainly uses the Registro Único de Contribuyentes (RUC) as its tax identification number. For natural persons without a separate RUC, the tax identification number is the cédula/NUI; RUC structures differ for natural persons, private companies and non-resident foreign individuals without a cédula, and public entities.

EC ECU 4 TIN types Last reviewed 2026-05-14

TIN types

4 published formats. Open a type to see examples, structure details, and official sources.

Validate Ecuador TIN

Ecuador Cédula de Identidad (NUI)

Current Individuals

Dirección General de Registro Civil, Identificación y Cedulación (Civil Registry, Identification and Cedulation Directorate)

The NUI is the 10-digit civil identity number shown on the Ecuadorian identity card and used as a personal tax identifier when a natural person does not have a separate RUC.

Details

Examples

171003406-5 304004038-2

Where to find it

On the Ecuadorian identity card; Registro Civil online services also refer to the NUI as the cédula number.

Common names

NUI Cédula Cédula de identidad Cédula de ciudadanía

Structure

1-2 Province or exterior code Code associated with the province, or 30 for Ecuadorians whose birth was registered abroad.

3-9 Personal sequence Core identity sequence assigned to the person.

11 Verifier Final check digit.

Official source

apps.registrocivil.gob.ec gob.ec oecd.org esacc.corteconstitucional.gob.ec ecuadorencifras.gob.ec

Ecuador RUC – Persona Natural

Current Individuals

Servicio de Rentas Internas (Internal Revenue Service)

RUC for Ecuadorian and resident foreign natural persons, formed from the person's 10-digit cédula/NUI followed by the establishment suffix 001.

Details

Examples

171003406-5-001 304004038-2-001

Where to find it

On the RUC certificate, SRI online RUC services, invoices, tax forms, and other tax-related documents.

Common names

RUC Registro Único de Contribuyentes

Structure

1-11 Cédula/NUI segment The natural person's identity-card number, shown with its verifier.

13-15 Establishment suffix Fixed suffix used for the taxpayer registration.

Official source

oecd.org gob.ec sri.gob.ec

Ecuador RUC – Sociedades Privadas y Extranjeros No Residentes

Current Individuals Entities

Servicio de Rentas Internas (Internal Revenue Service)

RUC assigned by SRI to private companies and to non-resident foreign individuals who do not have an Ecuadorian identity or citizenship card.

Details

Examples

179123456-9-001 099123456-9-001

Where to find it

On the RUC certificate, SRI online RUC lookup, invoices, tax forms, and other tax-related documents.

Common names

RUC Registro Único de Contribuyentes

Structure

1-2 Province code Province where the RUC was issued or the entity was registered.

3 Holder-class digit Digit identifying this RUC class.

4-9 Sequence Registration sequence assigned by SRI.

11 Verifier or sequence digit Digit used under SRI generation rules for this RUC class.

13-15 Establishment suffix Fixed suffix used for the taxpayer registration.

Official source

oecd.org gob.ec sri.gob.ec minka.gob.ec

Ecuador RUC – Entidades Públicas

Current Entities

Servicio de Rentas Internas (Internal Revenue Service)

RUC assigned by SRI to public-sector entities and other public bodies registered as taxpayers.

Details

Examples

176000123-0-001 016000123-0-001

Where to find it

On the RUC certificate, SRI online RUC lookup, invoices, tax forms, and other tax-related documents.

Common names

RUC Registro Único de Contribuyentes

Structure

1-2 Province code Province where the RUC was issued or the public entity was registered.

3 Holder-class digit Digit identifying public-entity RUCs.

4-8 Sequence Registration sequence assigned by SRI.

9 Verifier Verifier digit for this RUC class.

11 Fixed zero Fixed zero before the establishment suffix.

13-15 Establishment suffix Fixed suffix used for the taxpayer registration.

Official source

oecd.org gob.ec sri.gob.ec minka.gob.ec